Carburetor



. controlling valve.

Patented Apr. 6,1926.

UNITED STATES PATENT OFFICE.

FRANK DU'RAN'T or PATERSON, NEW JERSEY.

CARBURETOR.

Application filed November 26, 1924. Serial No. 752,418.

description of the invention, such as will en'- able others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements incarburetors for internal combustion engines and has reference more particularly to the general type of carburetor in which a valve which controls the supply of fuel to the fuel nozzle, is automatically adjusted by means which connects it with the throttle valve, so that the greater this throttle'valve is opened, the greater the supfply of fuel to the nozzle.

It is the object o the invention to provide a generally improved and simplified carburetor of the general type set forth, and with this in view, the invention resides in the novel subject matter hereinafter described and claimed, the description being supplemented by the accompanying draw- Figure 1 is a side elevation partly broken away and in section, illustrating the improved construction.

Figure-2 is a detail vertical section 22 of Fig. 3.

Figures 3 and 4 are horizontal sectional on line views on lines 33 and 4-4ef Fig. 1.

- Figure 5 is a side; elevation of the fuel Figure 6 is a longitudinal sectional View thereof.

Figure 7 is an enlarged horizontal section of the valve on line 77 of Fig. 5.

In the drawing above briefly described, a carburetor body has been shown which ineludes an air passage having a horizontal air intake branch 1 and a vertical branch 2, the latter being flanged as at 3 OIYOlZllGIWISB- adapted for connection to the usual intake manifold of an internal combustion motor.

In the branch 1, the usual choke valved is shown, while the well known throttle 5 is illustrated in the branch 2, said throttle having the usual rock shaft 6 which extendsto the exterior ofsaid branch and is operated by any of the well known connections. The carburetor body also includes an appropriate fuel bowl 7 which is preferably integral with the branch 1, and formed also. as a part of said-body, is a verticalcylinder 8 which is by preference, integral with the branch 1 and fuel bowl 7, the lower end of said cylinder being in direct communication with the fuel bowl, as indicated at 9, while the upper end' of said cylinder is open in the present disclosure. A substantially horizontal port 10 is" formed in the body and communicates at one of its ends with the cylinder 8,.at apoint between the upper and lower ends of said,

cylinder, the other end of said port 10 bein in'communieation with an appropriate fue nozzle 11 disposed in the air passage, a conventional restriction 12 being shown around said nozzle.

.Slidable vertically in the cylinder 8, is

The plunger 13 may be turned so that any ofthe grooves 14 will serve to supply fuel from the lower end of the cylinder 8, to-the port 10 and nozzle 11, the groove of proper size being brought into play, according to the requirements of the carburetor. When the plunger is lowered, only a very small amount of fuel can be drawn through the' active groove 14 and discharged from the nozzle 11, but the amount of fuel fed to this nozzle through the groove will increase proportionately with raising of the plunger 13,

and means are provided whereby this plung:

er is raised proportionately .with'opening of the throttle valve 5,

- Two links'15 straddle the upperfend of I the plunger 13, and a pin 16 is rovided for passage through said linksan plunger to connect them, regardless of the position to which the plunger may be turned, for bringing one or another of the grooves 14 into play. The upper end of the plunger 13 is preferably. provided with opposed flat sides 17 to engage the links 15, and said flat sided upper end is formed with a suitable number of openings 18 to receive the pin 16. p

The upper ends of the links 15 are pivoted at 19 to a crank arm 20 secured on the rock shaft 6, said crank armnormally extending downwardly when the throttle is closed, so that as said throttle is opened, the

arm will be raised, thus pulling upon the links and correspondingly raising the plunger 13.

Excellent results may be obtained from 1 claim I 1. A carburetor fuel control valve comprising a vertical cylinder whose lower end is formed with an inlet, said cylinder having a fuel outlet at a single point between 7 its ends, a plunger received slidably and rotatably ,in said cylinder, said plunger having a plurality of different sized circumfer- "entially spaced upwardly tapered grooves from its lower extremity to an elevation between its ends, any one of said grooves being adapted to be positioned for communication with said outlet by turning the plunger in the cylinder by hand, and raising and lowering means for said plunger.

2. A structure as speci ed in claim 1, said raising and lowering means for the plunger embodying means for holding said plunger against accidental rotation.

3. A structure as specified in claim 1; said raising and lowering means for said plunger including a pair of laterally spaced members tostraddle the upper end of the plunger, and a pin for passing through said members and plunger, the latter having a plurality of openings, any one of which may receive said pin, according to the position to which the plunger is turned.

In testimony whereof I have hereunto aflixed my signature.

FRANK DURANTE. 

